Price, Hellenthal & Dalgleish, 2005 : 15 New species and additional data on the chewing louse genus Myrsidea (Phthiraptera: Menoponidae) from wild Neotropical Passeriformes (Aves) Kolencik, Stanislav Sychra, Oldrich Papousek, Ivo Kuabara, Kamila M. D. Valim, Michel P. Literak, Ivan Zootaxa 2018 4418 5 401 431 Price, Hellenthal & Dalgleish, 2005 Price, Hellenthal & Dalgleish 2005 [151,809,1153,1179] Insecta Menoponidae Myrsidea GBIF Animalia Phthiraptera 27 428 Arthropoda species olivacei     Myrsidea olivacei  Price, Hellenthal & Dalgleish, 2005: 15, fig. 20.    Typehost.  Mionectes olivaceusLawrence, 1868—olive-striped flycatcher.    Typelocality. Simlanear Arima, Trinidad & Tobago.    Materialexamined. Ex  Mionectes olivaceus: 2♀, 2♂,  Rincón de la Vieja, Costa Rica( 10°46'N, 85°18'W),  22–24 August 2009, O. Sychra& I. Literak( MMBC);  2♂, Tapantí National Park, Sector Tapantí, Costa Rica( 09°46'N, 83°47'W),  6 August 2009, O. Sychra& I. Literak( MMBC).   Remarks.This is the first record of  M. olivaceifrom  CostaRica. Our specimens differ from the original description of  M. olivaceiby setal counts and dimensions, as follows [data from Price et al.(2005) are in parentheses]:   Female (n = 2).Metanotum with 9–10 (10) marginal setae Tergal setae: I, 8–9 (11); III, 1 3–15(12–13); IV, 13– 14 (12–13); V, 15–16 (12–13); VI, 12–14 (12–13); VII, 11–12 (10); VIII, 7–9 (6). Sternal setae: II, with 13–16 marginal setae between asters, 4–6 medioanterior (total number of setae on sternite II including aster setae is 25–30 vs 32 inPrice et al.2005); III, 22–24 (24); V, 34 (28–31); VI, 26–29 (28–31); VII, 16 (13); VIII–IX, 8–9; and 12– 13 setae on serrated vulvar margin (total number of VIII–IX sternal setae is 20–22 incomparison with 18 inPrice et al.2005). Dimensions: HL, 0.28–0.29 (0.31); PW, 0.28–0.29 (0.28); MW, 0.41–0.42 (0.43); AWIV, 0.54–0.56 (0.55); ANW, 0.21 (0.20); TL, 1.46–1.49 (1.43).  Male (n = 4).Metanotum with 6–9 (8) marginal setae. Tergal setae: I, 7–8 (9); II, 12–14 (13); III, 12–13 (9– 12); IV, 12–15 (9–12); V, 13–15 (9–12); VI, 11–14 (9–12); VII, 8–12 (8); VIII, 7–8 (6). Sternal setae: II, with 13– 14 marginal setae between asters, 4–5 medioanterior (total number of setae on sternite II including aster setae is 25–27 vs 27 inPrice et al.2005); III, 1 7–21(19); IV, 22–26 (21); V, 28–33 (26); VI, 24–26 (21); VII, 14–16 (12); VIII, 6–7 (5); remainder of plate, 6–9. Dimensions: TW, 0.39–0.40 (0.40); HL, 0.24 (0.28); PW, 0.25–0.26 (0.26); MW, 0.32–0.33 (0.35); AWIV, 0.41–0.42 (0.44); TL, 1.18–1.20 (1.12). 1844420390 [199,799,1326,1351] Trinidad and Tobago Simla 27 428 1 Arima holotype 1844420386 2009-08-22 2009-08-24 2009-08-22 MMBC Rincon de la Vieja & O. Sychra & I. Literak Costa Rica Rincon de la Vieja 10.766666 Material 1297 -85.3 Ex 27 428 4 2 2 1844420383 2009-08-06 MMBC O. Sychra & I. Literak Costa Rica 9.766666 Tapanti National Park 1299 -83.78333 Sector Tapanti 27 428 2 2